mirror of
https://github.com/golang/go
synced 2024-11-06 09:16:16 -07:00
9774fa6f40
&^ and << have equal precedence. Add some parentheses to make sure we shift before we andnot. Fixes #27829 Change-Id: Iba8576201f0f7c52bf9795aaa75d15d8f9a76811 Reviewed-on: https://go-review.googlesource.com/136899 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
28 lines
492 B
Go
28 lines
492 B
Go
// run
|
|
|
|
// Copyright 2018 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Bad AND/BTR combination rule.
|
|
|
|
package main
|
|
|
|
import "fmt"
|
|
|
|
//go:noinline
|
|
func f(x uint64) uint64 {
|
|
return (x >> 48) &^ (uint64(0x4000))
|
|
}
|
|
|
|
func main() {
|
|
bad := false
|
|
if got, want := f(^uint64(0)), uint64(0xbfff); got != want {
|
|
fmt.Printf("got %x, want %x\n", got, want)
|
|
bad = true
|
|
}
|
|
if bad {
|
|
panic("bad")
|
|
}
|
|
}
|